Ypsilanti, Michigan WWTP Selects Ovivo for Grit Removal Retrofit

Collector mechanism and influent deflectors

The Ypsilanti Community Utilities Authority (YCUA) provides water and wastewater services to the Ypsilanti, Michigan area and processes over 8 billion gallons of sewage annually. Recently, YCUA completed upgrades to one of their wastewater plants on the southeast side of Detroit.

The Ovivo retrofit equipment included full replacement of two 40-foot diameter grit separator mechanisms. The rotating mechanism (rake arms and drive) that removes the grit from the circular tanks along with the influent deflectors directing the flow were replaced. The deflectors were also replaced in a third tank in the flow train.

In addition to the rotating assembly, slotted rotating scum pipes were retrofitted to replace the existing manually operated scum pipes. The new scum pipes included motorized operators to allow the plant personnel to make adjustments remotely if desired.

Outside the tanks, a Reciprocating rake style classifier was also supplied to replace the existing unit. The grit from is pumped up to a settlement area, and the grit is slowly moved up an incline to drain before being collected.

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